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Did Not Connect: Potential Security Issue

2 updates before this website was working fine for me, now whenever I try to access the website "https://www.hcai.ca/" I get the error "Did Not Connect: Potential Security Issue
Error code: SEC_ERROR_UNKNOWN_ISSUER

You can find detail like the issuer of the certificate and intermediate certificates in the Details tab.

We need the base64 encoded certificate data to be able to inspect the certificate.
<pre><nowiki>-----BEGIN CERTIFICATE-----
(base64 encoded certificate)
-----END CERTIFICATE-----</nowiki></pre>
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You can check if there is more detail available about the issuer of the certificate.
*click the "Advanced" button show more details
*click the blue error text (SEC_ERROR_UNKNOWN_ISSUER) to show the certificate chain
*click "Copy text to clipboard" and paste the base64 certificate chain text in a reply
If clicking the blue error text doesn't provide the certificate chain then try these steps to inspect the certificate.
*open the Servers tab in the Certificate Manager
**Options/Preferences -> Privacy & Security<br>Certificates: View Certificates -> Servers: "Add Exception"
*paste the URL of the website (https://xxx.xxx) in it's Location field
Let Firefox retrieve the certificate -> "Get Certificate"
*click the "View" button and inspect the certificate
You can find detail like the issuer of the certificate and intermediate certificates in the Details tab.